What are the key takeaways from this a16z Podcast episode?

Key insights include: **Grid bottleneck reframe:** New power generation is not the constraint holding back U.S. energy growth — transmission and delivery infrastructure is. Decades of efficiency gains masked underinvestment in grid delivery systems, but with data centers, EV adoption, and industrial electrification converging simultaneously, delivery failures are now unavoidable and require hardware-level solutions at the distribution layer.; **Microreactor economics threshold:** Radiant's one-megawatt trailer-mounted nuclear reactor becomes cost-competitive against diesel generators at approximately $6.50 per gallon diesel pricing. Target markets include islands, remote military bases, and high-cost regions like Hawaii (80% diesel-powered) and Northern Europe, where national average diesel prices already exceed $7–9 per gallon, making the economics viable today.; **Solid-state transformer scale:** Heron's first product, Heron Link, converts 800–1,500V DC to 34kV AC in a modular 5-megawatt unit built from 365 individual 15kW modules. The fail-operational architecture keeps running if individual modules fail. A planned 40-gigawatt annual factory — equivalent to roughly 4% of total U.S. peak grid power — targets 60-second takt time for maximum capital efficiency.

What did Doug Bernauer and Drew Baglino discuss on a16z Podcast?

Doug Bernauer (Radiant) and Drew Baglino (Heron) join a16z's Aaron Price Wright to examine why U.S. electricity delivery — not generation — is the core bottleneck, and how factory-built one-megawatt nuclear reactors and solid-state 5-megawatt transformers address power demand from data centers, defense, and reindustrialization. Key topics include: **Grid bottleneck reframe:** New power generation is not the constraint holding back U.S. energy growth — transmission and delivery infrastructure is. Decades of efficiency gains masked underinvestment in grid delivery systems, but with data centers, EV adoption, and industrial electrification converging simultaneously, delivery failures are now unavoidable and require hardware-level solutions at the distribution layer.; **Microreactor economics threshold:** Radiant's one-megawatt trailer-mounted nuclear reactor becomes cost-competitive against diesel generators at approximately $6.50 per gallon diesel pricing. Target markets include islands, remote military bases, and high-cost regions like Hawaii (80% diesel-powered) and Northern Europe, where national average diesel prices already exceed $7–9 per gallon, making the economics viable today..

How long is this episode of a16z Podcast?

This episode is 49 minutes long. SignalCast provides an AI-generated summary so you can get the key insights in about 3 minutes.

a16z Podcast

How Radiant and Heron Are Rethinking Power Generation and Delivery

March 31, 2026

49 min episode · 2 min read

Doug Bernauer,Drew Baglino,Aaron Price Wright

Episode

49 min

Read time

2 min

Topics

Productivity, Investing, Fundraising & VC

AI-Generated Summary

Published Mar 31, 2026

Key Takeaways

✓Grid bottleneck reframe: New power generation is not the constraint holding back U.S. energy growth — transmission and delivery infrastructure is. Decades of efficiency gains masked underinvestment in grid delivery systems, but with data centers, EV adoption, and industrial electrification converging simultaneously, delivery failures are now unavoidable and require hardware-level solutions at the distribution layer.
✓Microreactor economics threshold: Radiant's one-megawatt trailer-mounted nuclear reactor becomes cost-competitive against diesel generators at approximately $6.50 per gallon diesel pricing. Target markets include islands, remote military bases, and high-cost regions like Hawaii (80% diesel-powered) and Northern Europe, where national average diesel prices already exceed $7–9 per gallon, making the economics viable today.
✓Solid-state transformer scale: Heron's first product, Heron Link, converts 800–1,500V DC to 34kV AC in a modular 5-megawatt unit built from 365 individual 15kW modules. The fail-operational architecture keeps running if individual modules fail. A planned 40-gigawatt annual factory — equivalent to roughly 4% of total U.S. peak grid power — targets 60-second takt time for maximum capital efficiency.
✓DC microgrid convergence: Solar generation, battery storage, compute infrastructure, and Radiant's microreactors all natively operate on DC power. Combining these with solid-state power electronics enables self-contained DC microgrids deployable at military installations, hospitals, or disaster zones — bypassing the complexity of grid interconnection entirely and reducing permitting, civil construction, and installation timelines to roughly 48 hours.
✓Data center grid impact: Data centers are net-positive for electricity rates because they consume near maximum capacity continuously, unlike residential customers averaging roughly 10% utilization. Higher steady-state loads increase kilowatt-hour throughput across fixed delivery infrastructure, lowering per-unit costs for all ratepayers. The destabilization risk — gigawatt-scale facilities disconnecting instantly — is solvable through software-defined grid-forming controls and modest onsite energy storage.

What It Covers

Doug Bernauer (Radiant) and Drew Baglino (Heron) join a16z's Aaron Price Wright to examine why U.S. electricity delivery — not generation — is the core bottleneck, and how factory-built one-megawatt nuclear reactors and solid-state 5-megawatt transformers address power demand from data centers, defense, and reindustrialization.

Key Questions Answered

•Grid bottleneck reframe: New power generation is not the constraint holding back U.S. energy growth — transmission and delivery infrastructure is. Decades of efficiency gains masked underinvestment in grid delivery systems, but with data centers, EV adoption, and industrial electrification converging simultaneously, delivery failures are now unavoidable and require hardware-level solutions at the distribution layer.
•Microreactor economics threshold: Radiant's one-megawatt trailer-mounted nuclear reactor becomes cost-competitive against diesel generators at approximately $6.50 per gallon diesel pricing. Target markets include islands, remote military bases, and high-cost regions like Hawaii (80% diesel-powered) and Northern Europe, where national average diesel prices already exceed $7–9 per gallon, making the economics viable today.
•Solid-state transformer scale: Heron's first product, Heron Link, converts 800–1,500V DC to 34kV AC in a modular 5-megawatt unit built from 365 individual 15kW modules. The fail-operational architecture keeps running if individual modules fail. A planned 40-gigawatt annual factory — equivalent to roughly 4% of total U.S. peak grid power — targets 60-second takt time for maximum capital efficiency.
•DC microgrid convergence: Solar generation, battery storage, compute infrastructure, and Radiant's microreactors all natively operate on DC power. Combining these with solid-state power electronics enables self-contained DC microgrids deployable at military installations, hospitals, or disaster zones — bypassing the complexity of grid interconnection entirely and reducing permitting, civil construction, and installation timelines to roughly 48 hours.
•Data center grid impact: Data centers are net-positive for electricity rates because they consume near maximum capacity continuously, unlike residential customers averaging roughly 10% utilization. Higher steady-state loads increase kilowatt-hour throughput across fixed delivery infrastructure, lowering per-unit costs for all ratepayers. The destabilization risk — gigawatt-scale facilities disconnecting instantly — is solvable through software-defined grid-forming controls and modest onsite energy storage.

Notable Moment

Bernauer noted that when Earth formed four billion years ago, uranium-235 concentrations were 128 times higher than today. The element continuously decays whether used or not — framing nuclear fuel extraction as equivalent to harvesting sunlight: capture a free resource before it dissipates naturally underground.

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Episode Transcript

The grid is breaking. We're so bottlenecked today on the lines that run crisscross across the country. I mean, it's this very complicated giant organic machine. New power is not the problem. Delivery is the problem. The energy services were growing over time in The United States. The net electricity delivered to accomplish those energy services stayed basically flat. So we can take that momentum and bring it into a new problem statement, which is power for data centers, power power for industrialization, power for economic growth and prosperity, and for sustainable energy. The idea that the grid can grow and move from the edge is just not something that we've really been able to process for the last fifty years in The US. The grid itself is civilization. Right? Electric power is civilization. You can metamorphosize the entire grid. Civilization can regrow off of a new architecture of moving power, right, and use all of the free energy that's out there. The sunlight is free. You put the panel, you're getting it. It's very cool, but also your aim is free. It's in the grounds. It's there. If you take it and we use it before it just goes away, it makes this, like, completely new way, I think, of thinking about nuclear power. It's just it's in the options list, and it wasn't even before. Electric power is civilization. Every socket, every server assumes a grid that works. When Edison wired Lower Manhattan in 1882, he connected electricity demand is rising for the first time in decades. Data centers, electrified transport, and reshoring are outpacing the efficiency gains that mask years of grid underinvestment. New generation is not the bottleneck. Delivery is. This episode examines two responses, portable nuclear reactors built in a factory and solid state power electronics designed to rebuild the grid from the edge. I speak with Doug Bernauer, founder and CEO of Radiant, and Drew Baglino, founder and CEO of Heron, alongside a 16 z general partner, Aaron Price Wright. Hey, everybody. We're here to talk about energy and how your companies are playing a role in the sector. But first, let's start with, how do you guys know each other? Yeah. So I'm Doug Bernauer. Drew Baglino. And so we know each other. We were both working for Elon Yep. About ten years ago, but at two different companies. So I was at SpaceX, and Elon was really excited. He wanted to build Hyperloop. He wanted to put little cars in a vacuum tube and go super fast. And Drew is a VP of r and d at Tesla at the time, and I called him up and was like, Elon says we need battery packs. We need model s motor. We need to operate these things in a never before operated condition. And Drew's like, do we really? And I was like, yeah. We kinda do. But it was kinda like that. And then from there, we did Boring Company also. There …

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